نتایج جستجو برای: LOS rate
تعداد نتایج: 1133751 فیلتر نتایج به سال:
The line of sight (LOS) rate is a parameter that is needed to calculate the acceleration applied to missiles by the proportional guidance laws in order to hit the target. This rate is usually measured using gimbaled seekers. However, if the type of missile seeker be strap down, the LOS rate must be calculated from deriving the missile's seeker output angles or estimation methodes. The derivatio...
Based on the idea of Continuous Fuzzy Guidance Law (CFGL), a andldquo;three-phase fuzzy guidanceandrdquo; (TFG) law is proposed for the class of surface to air homing missiles. The current approach enables the guidance law to track a maneuvering target from the beginning of the launch phase up to the terminal one while itdynamically attempts to keep miss-distance, flight time and control effort...
background: euroscore is a simple and rigorous risk stratification model and is, thus, commonly used in predicting the early and late outcomes of cardiac surgery across the world. we aimed to assess the discriminative power of the euroscore model to predict postoperative morbidity and total prolonged length of stay in hospital (los) and intensive care unit (icu) stay in an iranian group of card...
background: left ventricular dysfunction is one of the most powerful predictors of early and late outcomes in patients who undergo coronary artery bypass grafting (cabg). the aim of this study was to assess the early results of cabg that predict 30-day mortality and prolonged length of hospital stay (los) after cabg in patients with an ejection fraction (ef) of 30% or less. methods: seven hundr...
Introduction: Due to the scarcity at health facilities, personnel, equipments, and progressive increase in health services costs, improving the length of stay (LOS) in hospitals, and factors affecting the LOS becomes much important. Bed occupancy, longer and unnecessary LOS is a waste of resource, and increase if OPP. This study carried out aimed to determine whether there is a relationship bet...
BackgroundWe aimed to compare the efficacy of nebulized hypertonic (3%, 5% and 7%) saline with normal saline in hospitalized infants with acute bronchiolitis.Materials and MethodsIn this triple-blinded randomized clinical trial, 120 children with moderate to severe bronchiolitis randomly assigned into four groups to receive nebulized normal saline (group A), saline 3% (group B), saline 5% (gro...
Background: This study investigated the Length of Stay (LOS) in the Intensive Care Unit (ICU) and its influential factors as a step toward revising hospital policies, more appropriate resources usage and improving health system performance. Materials and Methods: this cross-sectional study was conducted on 246 patients, among nine general ICUs of Tehran University of Medical Sciences. Variab...
Background and purpose: Modeling of Hospital Length of Stay (LOS) is of great importance in healthcare systems, but there is paucity of information on this issue in Iran. The aim of this study was to identify the optimal model among different mixed poisson distributions in modeling the LOS and effective factors. Materials and methods: In this cross-sectional study, we studied 1256 records, inc...
BACKGROUND Atropine reduces the rate of reflux episodes in normal subjects by inhibition of transient lower oesophageal sphincter (LOS) relaxations. The aim of this study was to investigate the effect of atropine on the rate and mechanisms of reflux in patients with reflux disease. METHODS Oesophageal motility and pH were recorded for one hour after a meal in 15 patients with reflux disease. ...
Introduction: Studies support the idea that low levels of vitamin D are associated with a higher risk of heart disease. Losartan has also been prescribed as a drug commonly used for treating hypertension. The aim of the current study was to investigate the effects of 1,25-dihydroxyvitamin D in combination with a non-hypotensive dose of losartan on myocardial infarct size, reperfusion-induced...
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